.list .item{
    background: #32c3de;
    border-radius: 5px;
    height: 30px;
    width: 200px;
    padding: 2px 10px;
    margin: 5px;
    display: flex;
    align-items: center;
    cursor: pointer;
}

.list .item.moving{
    background: transparent; /* 透明的 */
    color: transparent;
    border: 1px dashed #ccc;
}